Since the CLID said "WIRELESS CALLER" and the number is local, I picked up and said "hello".  I immediately received a recording that started out by saying "Congratulations, you have just won a free cruise".  I immediately hung up the phone.  95% of the time I don't answer or pick up the call and hang up immediately.  Since I live in the ATL area, and since it looked like a cell phone - all I can say is they got me on that one!